How does today’s extreme heat compare with Earth’s past climate?

"There is no one perfect temperature for the Earth, but there is for us humans," as Katharine Hayhoe, a leading climate scientist at the Nature Conservancy, has put it. "We are perfectly adapted to our current conditions. Two-thirds of the world's largest cities are located within a metre of sea level. 

"What happens when sea level rises a metre or more, as it's likely to this century? We can't pick up Shanghai or London or New York and move them. Most of our arable land is already carefully allocated and farmed."

https://www.theguardian.com/environment/article/2024/aug/14/how-does-today-extreme-heat-compare-with-earth-past-climate